Diaphragm-frame mounting for reproducers



n. H. WILSON. DIAPHRAGIVI FRAME MOUNTING FOR REPRODUCERS.

APPLICATION FILED SEPT` I5, 1921.

Patented Au 26 27 l nvm/1160@ DAVID H. WLSON, OF EHILADELHA, PENNSYLVANA.

DIAPHRGlu-FRADE Til-'OUNTNG FOR REROEUCERS.

Application filed September 15, 1921.

T all whom 25 4may concern.'

Be it known that l. Dlivio HENRY WVU.- soN, a citizen ot the United States of America. residing at 6069 Chester Avenue. Philadelphia,y in the county of Philadelphia and State oit Pennsylvania, have invented certain new and usetul Improvements in Diaphragm-F rame lilountings tor Reproducers, of which the following is a specification.

This invention relates to phonographs and other like sound reproducing machines.

More particularly the invention relates to diaphragm trame mounting for reproducers.

One important objectof the invention is to improve and simplify the general con" struction ot devices of this character.

A second important object of the invern tion is to provide an improved mounting for a diaphragm trame which will afford the frame absolute freedom of motion and vibration.

A third important object of the invention is to provide an improved and simple means for regulating the extent of movement and vibration in the diaphragm trame mounting of such reproducers.

lith the above and other objects in view` the invention consists in lgeneral ot certain novel details of construction and combinations ot parts hereinafter fully described, illustrated in the accompanying drawings, and specifically claimed. A

In the accompanying drawings, like characters of reference indicate like parts in the several views, and

Figure 1 is a tace view ot a reproducer constructed in accordance with this invention.

Figure 2 is a view similar to Figure 1 but with the 'front ring of the casing removed. Y

Figure 3 is a sect-ion on the line 3 3 of Figure 1.

Figure /1 is an enlarged detailed section through the line 1 1 of Figure 8.

Figure 5 is an enlarged detailed section on the line 5-5 of Figure 3.

Figure 6 is a detailed section on the line 6-6 of Figure 1.

In carrying out the objects ot this invention and in the embodiment shown in the accompanyingdrawings there is provided a casing having a back 10 surrounded bv an annular wall 11 projecting toward the iront of the reproducer. In the centre of the back Specification of Letters I'atent.

Patented Aug. 15, T1822.

Serial No. 500,883.

wall is a circular opening 12 and at the top of the reproducer is a boss 13 threaded interiorly. The diaphragm case proper con* sists of a back 15 surrounded by an annular wall 16 and having a centrally located rearwardly projecting tube 17. which passes through the opening 12 and is 'tree there^ from. The front edge of thewall 16 is threaded interiorly for the reception of a retaining ring 18 and between this retain ing ring and the back wall is located the usual diaphragm 19 which. is supported around its periphery by the elastic rings 20 of rubber or other like material. dt the front of the reproducing casing is a retaining ring 21 which is secured to the back of said casing by screws 22 entering lugs 28 formed'on the wall 11. The proportions ot j the diaphragm and the reproducer casing` are such that a channel 34 surrounds the frame and said trame is spaced both from the back 10 and the retaining ring 21 asl clearly shown in Figure 3.

Surrounding the frame is a groove 25 and between the wall 11 and the wall 16 are VNmounted balls 26 which rest in this groove.

Projecting inwardly from the wall 11 are lugs 27 against which two of the balls 26 rest. Through the boss 13 extends an adjusting screw 28 having` recess 29 in its point and between this recess and the wall 16 is mounted the third ball 26, the parts being so arranged that the three balls evenly spaced around the diaphragm trame. The screw 28 is projected with a knurled edge 30 for adjustment and there is also on this screw a lock nut 31 to holdthe screw in its adjusted position.

Mounted on the casing is the usual needic-bar support 32 carrying` the needle-bar the interior end ot which is connected to the diaphragm and the outer end of which is provided with the ordinary needle holder 34.

lit will be obvious, from the construction, that the diaphragm trame is supported within the casing by a three-point suspension and that, by adjusting the screw 28 the pressure on the balls may be regulated at will so that the support between the casing and the traine may be ma de as looseor as rigid as desired.

There has thus been provided a vsimple and efficient device of the kind described-i and for the purpose specified.

t is obvious that minor changes may be iliade in the form and construction of the invention Without departing from the inateiial principles thereof. Itis `not therefore desired to confine the invention to the exact forni herein shown and described, but

it is wished to include all such `as properly come within the scope claimed.

Having thus described the invention, what is claimed as new, isz- 1. In a device ofthe kind desoribedva reproducer casing, a diaphragm trarne positioned Within `said easing in spaced relation to the walls thereof7 balls spaced evenly` around. the periphery of the iii-aine between said 'traine and the casing, and ineans to exert pressure inwardly on one of said balls and therebj7 increase the pressure between the remaining balls and the `frame.

signature.

In a device of the kind described, a repioducer casing having a back wall and a peripheral side wall `a diaphragm iranie `having a back Wall and a side Wall mounted DAVID H. WILSON. 

